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Finding the Fourth Proportional to 67,437.80, 100,983.90 and 49,812.20

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Solution

The fourth proportional to 67,437.80, 100,983.90 and 49,812.20 is: 74,590.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,437.80 : 100,983.90 = 49,812.20 : x
  2. Step 2: Convert to fraction form
    67,437.80/100,983.90 = 49,812.20/x
  3. Step 3: Cross multiply
    67,437.80x = 100,983.90 × 49,812.20
  4. Step 4: Simplify right side
    67,437.80x = 5,030,230,223.58
  5. Step 5: Solve for x
    x = 5,030,230,223.58/67,437.80
  6. Step 6: Final answer
    x = 74,590.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.